tdesktop/Telegram/SourceFiles/lang/lang_instance.cpp at master · JavaDevl/tdesktop · GitHub

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This file is part of Telegram Desktop,

the official desktop version of Telegram messaging app, see https://telegram.org

Telegram Desktop is free software: you can redistribute it and/or modify

it under the terms of the GNU General Public License as published by

the Free Software Foundation, either version 3 of the License, or

(at your option) any later version.

It is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

GNU General Public License for more details.

In addition, as a special exception, the copyright holders give permission

to link the code of portions of this program with the OpenSSL library.

Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE

#include "lang/lang_instance.h"

#include "messenger.h"

#include "storage/serialize_common.h"

#include "storage/localstorage.h"

#include "platform/platform_specific.h"

#include "boxes/confirm_box.h"

#include "lang/lang_file_parser.h"

#include "base/qthelp_regex.h"

namespace Lang {

namespace {

constexpr auto kDefaultLanguage = str_const("en");

constexpr auto kLangValuesLimit = 20000;

class ValueParser {

public:

ValueParser(const QByteArray &key, LangKey keyIndex, const QByteArray &value);

QString takeResult() {

Expects(!_failed);

return std::move(_result);

}

bool parse();

private:

void appendToResult(const char *nextBegin);

bool logError(const QString &text);

bool readTag();

const QByteArray &_key;

LangKey _keyIndex = kLangKeysCount;

QLatin1String _currentTag;

ushort _currentTagIndex = 0;

QString _currentTagReplacer;

bool _failed = true;

const char *_begin = nullptr;

const char *_ch = nullptr;

const char *_end = nullptr;

QString _result;

OrderedSet<ushort> _tagsUsed;

};

ValueParser::ValueParser(const QByteArray &key, LangKey keyIndex, const QByteArray &value)

: _key(key)

, _keyIndex(keyIndex)

, _currentTag("")

, _begin(value.constData())

, _ch(_begin)

, _end(_begin + value.size()) {

}

void ValueParser::appendToResult(const char *nextBegin) {

if (_ch > _begin) _result.append(QString::fromUtf8(_begin, _ch - _begin));

_begin = nextBegin;

}

bool ValueParser::logError(const QString &text) {

_failed = true;

auto loggedKey = (_currentTag.size() > 0) ? (_key + QString(':') + _currentTag) : QString(_key);

LOG(("Lang Error: %1 (key '%2')").arg(text).arg(loggedKey));

return false;

}

bool ValueParser::readTag() {

auto tagStart = _ch;

auto isTagChar = [](QChar ch) {

if (ch >= 'a' && ch <= 'z') {

return true;

} else if (ch >= 'A' && ch <= 'z') {

return true;

} else if (ch >= '0' && ch <= '9') {

return true;

}

return (ch == '_');

};

while (_ch != _end && isTagChar(*_ch)) {

++_ch;

}

if (_ch == tagStart) {

return logError("Expected tag name");

}

_currentTag = QLatin1String(tagStart, _ch - tagStart);

if (_ch == _end || *_ch != '}') {

return logError("Expected '}' after tag name");

}

_currentTagIndex = GetTagIndex(_currentTag);

if (_currentTagIndex == kTagsCount) {

return logError("Unknown tag");

}

if (!IsTagReplaced(_keyIndex, _currentTagIndex)) {

return logError("Unexpected tag");

}

if (_tagsUsed.contains(_currentTagIndex)) {

return logError("Repeated tag");

}

_tagsUsed.insert(_currentTagIndex);

if (_currentTagReplacer.isEmpty()) {

_currentTagReplacer = QString(4, TextCommand);

_currentTagReplacer[1] = TextCommandLangTag;

}

_currentTagReplacer[2] = QChar(0x0020 + _currentTagIndex);

return true;

}

bool ValueParser::parse() {

_failed = false;

_result.reserve(_end - _begin);

for (; _ch != _end; ++_ch) {

if (*_ch == '{') {

appendToResult(_ch);

++_ch;

if (!readTag()) {

return false;

}

_result.append(_currentTagReplacer);

_begin = _ch + 1;

_currentTag = QLatin1String("");

}

appendToResult(_end);

return true;

}

QString PrepareTestValue(const QString &current, QChar filler) {

auto size = current.size();

auto result = QString(size + 1, filler);

auto inCommand = false;

for (auto i = 0; i != size; ++i) {

auto ch = current[i];

auto newInCommand = (ch.unicode() == TextCommand) ? (!inCommand) : inCommand;

if (inCommand || newInCommand || ch.isSpace()) {

result[i + 1] = ch;

}

inCommand = newInCommand;

}

return result;

}

} // namespace

QString DefaultLanguageId() {

return str_const_toString(kDefaultLanguage);

}

void Instance::switchToId(const QString &id) {

reset();

_id = id;

if (_id == qstr("TEST_X") || _id == qstr("TEST_0")) {

for (auto &value : _values) {

value = PrepareTestValue(value, _id[5]);

}

_updated.notify();

}

updatePluralRules();

}

void Instance::switchToCustomFile(const QString &filePath) {

reset();

fillFromCustomFile(filePath);

Local::writeLangPack();

_updated.notify();

}

void Instance::reset() {

_values.clear();

_nonDefaultValues.clear();

_nonDefaultSet.clear();

_legacyId = kLegacyLanguageNone;

_customFilePathAbsolute = QString();

_customFilePathRelative = QString();

_customFileContent = QByteArray();

_version = 0;

fillDefaults();

}

void Instance::fillDefaults() {

Expects(_values.empty());

_values.reserve(kLangKeysCount);

for (auto i = 0; i != kLangKeysCount; ++i) {

_values.emplace_back(GetOriginalValue(LangKey(i)));

}

_nonDefaultSet = std::vector<uchar>(kLangKeysCount, 0);

}

QString Instance::systemLangCode() const {

if (_systemLanguage.isEmpty()) {

_systemLanguage = Platform::SystemLanguage();

if (_systemLanguage.isEmpty()) {

auto uiLanguages = QLocale::system().uiLanguages();

if (!uiLanguages.isEmpty()) {

_systemLanguage = uiLanguages.front();

}

if (_systemLanguage.isEmpty()) {

_systemLanguage = DefaultLanguageId();

}

return _systemLanguage;

}

QString Instance::cloudLangCode() const {

if (isCustom() || id().isEmpty()) {

return DefaultLanguageId();

}

return id();

}

QByteArray Instance::serialize() const {

auto size = Serialize::stringSize(_id);

size += sizeof(qint32); // version

size += Serialize::stringSize(_customFilePathAbsolute) + Serialize::stringSize(_customFilePathRelative);

size += Serialize::bytearraySize(_customFileContent);

size += sizeof(qint32); // _nonDefaultValues.size()

for (auto &nonDefault : _nonDefaultValues) {

size += Serialize::bytearraySize(nonDefault.first) + Serialize::bytearraySize(nonDefault.second);

}

auto result = QByteArray();

result.reserve(size);

{

QDataStream stream(&result, QIODevice::WriteOnly);

stream.setVersion(QDataStream::Qt_5_1);

stream << _id << qint32(_version);

stream << _customFilePathAbsolute << _customFilePathRelative << _customFileContent;

stream << qint32(_nonDefaultValues.size());

for (auto &nonDefault : _nonDefaultValues) {

stream << nonDefault.first << nonDefault.second;

}

return result;

}

void Instance::fillFromSerialized(const QByteArray &data) {

QDataStream stream(data);

stream.setVersion(QDataStream::Qt_5_1);

QString id;

qint32 version = 0;

QString customFilePathAbsolute, customFilePathRelative;

QByteArray customFileContent;

qint32 nonDefaultValuesCount = 0;

stream >> id >> version;

stream >> customFilePathAbsolute >> customFilePathRelative >> customFileContent;

stream >> nonDefaultValuesCount;

if (stream.status() != QDataStream::Ok) {

LOG(("Lang Error: Could not read data from serialized langpack."));

return;

}

if (nonDefaultValuesCount > kLangValuesLimit) {

LOG(("Lang Error: Values count limit exceeded: %1").arg(nonDefaultValuesCount));

return;

}

if (!customFilePathAbsolute.isEmpty()) {

auto currentCustomFileContent = Lang::FileParser::ReadFile(customFilePathAbsolute, customFilePathRelative);

if (!currentCustomFileContent.isEmpty() && currentCustomFileContent != customFileContent) {

loadFromCustomContent(customFilePathAbsolute, customFilePathRelative, currentCustomFileContent);

Local::writeLangPack();

return;

}

std::vector<QByteArray> nonDefaultStrings;

nonDefaultStrings.reserve(2 * nonDefaultValuesCount);

for (auto i = 0; i != nonDefaultValuesCount; ++i) {

QByteArray key, value;

stream >> key >> value;

if (stream.status() != QDataStream::Ok) {

LOG(("Lang Error: Could not read data from serialized langpack."));

return;

}

nonDefaultStrings.push_back(key);

nonDefaultStrings.push_back(value);

}

_id = id;

_version = version;

_customFilePathAbsolute = customFilePathAbsolute;

_customFilePathRelative = customFilePathRelative;

_customFileContent = customFileContent;

LOG(("Lang Info: Loaded cached, keys: %1").arg(nonDefaultValuesCount));

for (auto i = 0, count = nonDefaultValuesCount * 2; i != count; i += 2) {

applyValue(nonDefaultStrings[i], nonDefaultStrings[i + 1]);

}

updatePluralRules();

}

void Instance::loadFromContent(const QByteArray &content) {

Lang::FileParser loader(content, [this](QLatin1String key, const QByteArray &value) {

applyValue(QByteArray(key.data(), key.size()), value);

});

if (!loader.errors().isEmpty()) {

LOG(("Lang load errors: %1").arg(loader.errors()));

} else if (!loader.warnings().isEmpty()) {

LOG(("Lang load warnings: %1").arg(loader.warnings()));

}

void Instance::loadFromCustomContent(const QString &absolutePath, const QString &relativePath, const QByteArray &content) {

_id = qsl("custom");

_version = 0;

_customFilePathAbsolute = absolutePath;

_customFilePathRelative = relativePath;

_customFileContent = content;

loadFromContent(_customFileContent);

}

void Instance::fillFromCustomFile(const QString &filePath) {

auto absolutePath = QFileInfo(filePath).absoluteFilePath();

auto relativePath = QDir().relativeFilePath(filePath);

auto content = Lang::FileParser::ReadFile(absolutePath, relativePath);

if (!content.isEmpty()) {

loadFromCustomContent(absolutePath, relativePath, content);

updatePluralRules();

}

void Instance::fillFromLegacy(int legacyId, const QString &legacyPath) {

if (legacyId == kLegacyDefaultLanguage) {

_legacyId = legacyId;

// We suppose that user didn't switch to the default language,

// so we will suggest him to switch to his language if we get it.

// The old available languages (de/it/nl/ko/es/pt_BR) won't be

// suggested anyway, because everyone saw the suggestion in intro.

_id = QString();// str_const_toString(kLegacyLanguages[legacyId]);

} else if (legacyId == kLegacyCustomLanguage) {

auto absolutePath = QFileInfo(legacyPath).absoluteFilePath();

auto relativePath = QDir().relativeFilePath(absolutePath);

auto content = Lang::FileParser::ReadFile(absolutePath, relativePath);

if (!content.isEmpty()) {

_legacyId = legacyId;

loadFromCustomContent(absolutePath, relativePath, content);

}

} else if (legacyId > kLegacyDefaultLanguage && legacyId < base::array_size(kLegacyLanguages)) {

auto languageId = str_const_toString(kLegacyLanguages[legacyId]);

auto resourcePath = qsl(":/langs/lang_") + languageId + qsl(".strings");

auto content = Lang::FileParser::ReadFile(resourcePath, resourcePath);

if (!content.isEmpty()) {

_legacyId = legacyId;

_id = languageId;

_version = 0;

loadFromContent(content);

}

_id = ConvertLegacyLanguageId(_id);

updatePluralRules();

}

template <typename SetCallback, typename ResetCallback>

void Instance::HandleString(const MTPLangPackString &mtpString, SetCallback setCallback, ResetCallback resetCallback) {

switch (mtpString.type()) {

case mtpc_langPackString: {

auto &string = mtpString.c_langPackString();

setCallback(qba(string.vkey), qba(string.vvalue));

} break;

case mtpc_langPackStringPluralized: {

auto &string = mtpString.c_langPackStringPluralized();

auto key = qba(string.vkey);

setCallback(key + "#zero", string.has_zero_value() ? qba(string.vzero_value) : QByteArray());

setCallback(key + "#one", string.has_one_value() ? qba(string.vone_value) : QByteArray());

setCallback(key + "#two", string.has_two_value() ? qba(string.vtwo_value) : QByteArray());

setCallback(key + "#few", string.has_few_value() ? qba(string.vfew_value) : QByteArray());

setCallback(key + "#many", string.has_many_value() ? qba(string.vmany_value) : QByteArray());

setCallback(key + "#other", qba(string.vother_value));

} break;

case mtpc_langPackStringDeleted: {

auto &string = mtpString.c_langPackStringDeleted();

auto key = qba(string.vkey);

resetCallback(key);

for (auto plural : { "#zero", "#one", "#two", "#few", "#many", "#other" }) {

resetCallback(key + plural);

}

} break;

default: Unexpected("LangPack string type in applyUpdate().");

}

void Instance::applyDifference(const MTPDlangPackDifference &difference) {

auto updateLanguageId = qs(difference.vlang_code);

auto isValidUpdate = (updateLanguageId == _id) || (_id.isEmpty() && updateLanguageId == DefaultLanguageId());

Expects(isValidUpdate);

Expects(difference.vfrom_version.v <= _version);

_version = difference.vversion.v;

for_const (auto &mtpString, difference.vstrings.v) {

HandleString(mtpString, [this](auto &&key, auto &&value) {

applyValue(key, value);

}, [this](auto &&key) {

resetValue(key);

});

}

_updated.notify();

}

std::map<LangKey, QString> Instance::ParseStrings(const MTPVector<MTPLangPackString> &strings) {

auto result = std::map<LangKey, QString>();

for (auto &mtpString : strings.v) {

HandleString(mtpString, [&result](auto &&key, auto &&value) {

ParseKeyValue(key, value, result);

}, [&result](auto &&key) {

auto keyIndex = GetKeyIndex(QLatin1String(key));

if (keyIndex != kLangKeysCount) {

result.erase(keyIndex);

}

});

}

return result;

}

template <typename Result>

LangKey Instance::ParseKeyValue(const QByteArray &key, const QByteArray &value, Result &result) {

auto keyIndex = GetKeyIndex(QLatin1String(key));

if (keyIndex == kLangKeysCount) {

LOG(("Lang Error: Unknown key '%1'").arg(QString::fromLatin1(key)));

return kLangKeysCount;

}

ValueParser parser(key, keyIndex, value);

if (parser.parse()) {

result[keyIndex] = parser.takeResult();

return keyIndex;

}

return kLangKeysCount;

}

void Instance::applyValue(const QByteArray &key, const QByteArray &value) {

_nonDefaultValues[key] = value;

auto index = ParseKeyValue(key, value, _values);

if (index != kLangKeysCount) {

_nonDefaultSet[index] = 1;

}

void Instance::updatePluralRules() {

auto id = _id;

if (isCustom()) {

auto path = _customFilePathAbsolute.isEmpty() ? _customFilePathRelative : _customFilePathAbsolute;

auto name = QFileInfo(path).fileName();

if (auto match = qthelp::regex_match("_([a-z]{2,3})(_[A-Z]{2,3}|\\-[a-z]{2,3})?\\.", name)) {

id = match->captured(1);

}

} else if (auto match = qthelp::regex_match("^([a-z]{2,3})(_[A-Z]{2,3}|\\-[a-z]{2,3})$", id)) {

id = match->captured(1);

}

UpdatePluralRules(id);

}

void Instance::resetValue(const QByteArray &key) {

_nonDefaultValues.erase(key);

auto keyIndex = GetKeyIndex(QLatin1String(key));

if (keyIndex != kLangKeysCount) {

_values[keyIndex] = GetOriginalValue(keyIndex);

}

Instance &Current() {

return Messenger::Instance().langpack();

}

} // namespace Lang

tdesktop/Telegram/SourceFiles/lang/lang_instance.cpp at master · JavaDevl/tdesktop · GitHub

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